Busan, officially known as Busan Metropolitan City, is South Korea's second most populous city after Seoul, with a population of over 3.4 million inhabitants as of 2017. Formerly romanized as Pusan (and Fusan before that), it is the economic, cultural and educational center of southeastern South Korea, with its port being South Korea's busiest and the sixth-busiest in the world. The surrounding "Southeastern Maritime Industrial Region" (including Ulsan, South Gyeongsang, Daegu, and some of North Gyeongsang and South Jeolla) is South Korea's largest industrial area. The large volumes of port traffic and urban population in excess of 1 million make Busan a Large-Port metropolis using the Southampton System of Port-City classification.
Busan is a center for international conventions, hosting a APEC summit in 2005. It is also a center for sports tournaments in Korea, having hosted the 2002 Asian Games and FIFA World Cup. It is home to the world's largest department store, the Shinsegae Centum City. Busan was added to the UNESCO Creative Cities Network as a "City of Film" in December 2014.